This might solve my puzzle. Doing a titration of a dissolved Alka-Seltzer solution I found that the solution neutralized more HCl than can be accounted for by just the NaHCO3 left over after the fizzing reaction, but less than would be neutralized by the whole amount of NaHCO3 in the tablet to...
Interesting note about the dissolved CO2 ending up in the stomach.
Given that the purpose of alka-seltzer is to neutralize the acid (HCl mostly I think) in the stomach, to what extent is the sodium citrate produced in the reaction between the sodium bicarbonate and the citric acid able to...
Alka seltzer contains 1916 mg of NaHCO3 and 1000 mg of citric acid.
According to some descriptions of the reaction between alka-seltzer and water and then HCl (in stomach), there is an excess of NaHCO3 in the alka-seltzer in relation to the citric acid and the benefits from alka-seltzer come...